Road machine



July 6, 1937.

C. A. GUSTAFSON ROAD MACHINE s sheets-sheet 1 Filed March 19, 1934 INVENTOR.

Car/ 1Q. Gasto/"son,

'ATTOR EY.

July 6, 1937.A c. A. GUSTFSON ROAD MACHINE Filed MaLIOh 19, 1934 3 SheetSv-Sheet 2 N\ .l 1li -l W INVENTOR. Cor/ A. Gustafson,

ATTORNEK '45 including gear box l1 Patented July 6, 1937 UNiTEo smras ROAD VMACHINE Carl A. Gustafson, Peoria, Ill., assigner to Caterf pillar Tractor Co., San Leandro, Calif., a-cory poration of California Application 1934, Serial No.-"" 7 1 6,v324

statement of invention f The present invention relates to road machines,

and more particularly to the provision of an improved plow construction for elevating graders.

5 It is an object of the invention to provide in an elevating grader, an improved plow construction in which the plow is readily adjusted with respect to the frame of the machine.

Another object of the invention is to provide an improved plow construction for elevating graders in which the suction, i. e., the angle of the plow with respect to the ground can be adjusted.

Another object of the invention is to provide an improved plow construction forelevating-graders which is. of asimple yet sturdy design. and which can be manufactured and assembled economically; I f

Other objects will appear as the description progresses. 20 Description of figures Fig. 1 is a left side elevation of anl elevating grader embodying the improved plow construction of my invention.

625 Fig. 2 is a schematic plan view of the graden Fig. 3 is a section taken in the plane ofthe line 3 3 in Fig. 2. l

Fig.14 is a fragmentary view indicated by the line 4-4 in Fig. 2.

f 30 `Fig. 5 is afragmentary sectional View taken as indicated by arrows 5--5 in Fig. 1.'

' Fig. 6 is a fragmentary sectional view taken in the plane of the line 6-6 in Fig. 5. T Description of machine y Y The elevating grader has` frame Ill which is supported in any 'suitable manner on front wheels II'and rear wheels I2. Carrier I3 has an end positioned below the arched central portion of frame fig() I0 and extends transversely thereof, being supported from frame IU by a plurality of chains I4 connected to carrier I3 and to shafts I6 on frame Ill. Shaftsl are operated by suitable gear and shaft connections from power control mechanism, v which houses reversible clutch means, controlled by hand levers I8 and drivenfrom engine I9. The drive not shown) Yfor the endlessiconveyoror belt is also provided by engine I9.V

"150 Adjacent the ground or pickupend of carrier Y I3, plow 2l is provided on a frame of tubular we1d- 'ed construction, 'whichfis adjustably connected toand supported from frame Ill.` lThe conventional adjustable 'connections between plow 2l '.55 land frame IIl'lprovide forf lateral' adjustment of 'its ends in brackets 46 m'unted on'frame'l in angle 69 welded to'member'lll. longitudinal movement of plow beam 2 6, chain 'II s claims. (o1. 3'1-110)V I the plow with respect tothe pickup'end of cai-f rier I3, and for tilting 'of the plow for v:bank cutting operations. 1 The adjustable vsupports for plow 2| provide for vertical adjustment thereof from operative to' inoperativeA position or vice 5 versa, and for adjustment of the suction of the plow, ire.. its angle with respect to theg-round.

,- Plow 2| (Fig. 1) is supported in a conventional manner by bracket 22, vertical plate orstandard 23, and brace'24, from plow frame'orbea'm'Z. 10

Two sets of longitudinally spaced transverse aper tures Zlare provided in`=` beam 26 for cooperation with pins on-standard 23 and brace 24, whereby plow 2| can be adjusted to castmaterialg'at lany desired location transversely of carrier I3. I 1'5 Plow beam 26 is of tubular construction'andis weighted at its rear end to-hold plow'2'lltolitls work. Beam 26 (Figs.'1,`2j, and 4) includes chan:-

`nel 36 having plate 31 wel :le d-betwe`en thejiianges thereof. Atthe rear end ofjbeam 26,'fweight v38 5'20 (Fig. 2) is secured therein by means oi bolts 39. 1

Beam 26 isprovided with spacedV connections tothe frame of the machine which are adjust;- ably connected thereto in a conventional manner, n to provide for lateraladjustment'of plow-2l vl'ritlri l2"5 respect to carrier "I3, and to provide forliiltingfof the plow outwardly for bank-cuttingoperatio Adjacent the vfront end and at the lower ed beam 26;,` tubular cross member 4I (Fig2""2)' has one end-pivotally connected to the'beam atf4f2. 30 Cross member 4I extends across underframe'l and isprovidedat itsother end with spaced'aper'- tures 43 adapted to receive pin 44*` (Figs. 2 and 3 passing through connecting yoke 45jour'naled at J""To 35 accomplish tilting of beam 26 with respect tocrss member 4I,'a telescopically adjustablemconnection is provided therebetween comprising `threaded members 5I (Figs. 2 and A) lpivoted"tob'eam 26 and member 4I, respective1y"ai1d`eaclhav "40 ling threaded engagement within coupling Y52. By

rotating coupling member 52,' beam 26 can'beadjustedangularl'y with respect tocross memb'rll to tilt plow'ZI outwardly. f y i Member 4I also serves to transmitthe'draftin 45 a Yconventional mannerirom frame Ill'l ofthe mafend, chain 6I is connected to clevis 66 embracing 50 member 4I and secured thereto by'bolt 61 paseing through one of the. mummy of apertures sa T0 prevent is secured between standard 23 and rame Il). '55

Adjacent its rear end, beam 26 has pivotal connection 12 with tubular cross member 13. Cross member 13 extends transversely of frame |0 and at its flat outer end, has spaced apertures 14. Member 13 extends through bracket 16 and is secured thereto by bolt 11 passing through one of apertures 14. Thus it is seen that spaced transverse members are provided for connecting the plow to the frame of the machine, said members being laterally adjustable to accomplish similar adjustment of plow 2 and also allowing for tilting of plow 2| to bank cutting position.

Adjustable lift means are provided fornsupporting plow 2| from frame I0, comprising spaced lift mechanisms which are selectively. operable to accomplish independent adjustment of either end of plow beam 26'to control suction of plow 2|.

Adjacent its front and rear ends, plow beam 26 (Fig. 1) is connected by resilient couplings 8| to'lift chains 82 having their upper ends con-f' nected to respective hoist drums 83, 84 on shaft 86.v Shaft 86 is journaled at its respective front and rear ends by bracket 81 and housing 88 on frame I0. Drum 83 is connected to shaft 86 for rotation therewith, and drum 84 is journaled thereon and is adapted to be clutched thereto. Controllable clutch means are provided for the rear lift mechanism to render saidmechanism operative or inoperative, and brake means are associated therewith to prevent undesired lmovement thereof. Drum 84 (Figl), at its frontend, has integral toothed clutch element 9| adapted for engagement with clutch element 92 slidably and non-rotatably engaged with splined portion 93 of shaft 86. Clutch element'92 is urged into engagement with clutch element 9| by spring 94, and can be disengaged therefrom by operation of lever 96 having its forked lower endpivoted on pin 91- (Figs. 5 and 6) in link 98 which is pivotally connected atits other end to bracket 99 on frame |0. The forked lower portionof lever 96 has opposite apertures to receive trunnions |0| on opposite collar members |02, secured together by suitable bolts and engaging an annular groove (Fig. 6) in clutch element 92. Thus, by oscillation of lever 96, clutch elements 9|, 92 can be adjusted to engaged or disengaged position.`

Brake means are provided for selectively maintaining the rear lift mechanism in adjusted position when the mechanism is disconnected from power shaft 86. Freely journaled hoist drum 84 (Fig. 6) has brake drum portion |06 engaged by brake band |01 (Figs.5 and 6) having one end secured to bracket 99 by threaded bolt |08 having adjusting nuts |09 secured thereon. At its other end, band |01 is pivotally connected to arm ||0 on shaft Shaft is journaled in bracket 99 and at its other end has foot pedal I2 secured thereto. Spring ||3 (Figs. 5 and 6) tensioned between frame |0 and foot pedal ||2 urges pedal I|2 to inoperative'position. When it is desired through rotation of shaft 86 to adjust the front lift mechanism 83, 82 independently offthe rear lift mechanism, lever 96 (Fig. 6) isY operated to disengage clutch elements 9 l, 92, and brake pedal 1| |2 is operated toA hold .brake `band |01 against brake drum portion |06. Should it be desired -to lower the rear lift mechanism 84, 82 independently of the front lift mechanism, this'can be readily done, even when shaft 86 is being driven, by disengaging clutch elements 9|, 92 and not actuating the brake. Thus, the rear Vend of the plow frame 26 'will .lower by gravity until the brake is actuated.;

the plow, which can be operated simultaneously or independently to raise and lower the ends of l, the plow beam, thereby adjusting the suction of the plow. The lift mechanisms are operated by power operated control mechanism including one of hand levers. |8 (Fig. l) adjacent operators seat |20. When desired, the control of the power loperated Ycontrol mechanism can be varied by operation of the clutch lever 96 and foot pedal ||2.

I, therefore, claim as myY invention:

l. In an elevating grader, an .earthengaging tool, means for adjustably supporting said tool at spaced points, and means for adjusting said supportingmeans including a Vpower shaft extending substantially the entire distance between said spaced lpoints and connected adjacent'the ends thereof to said supporting means, a releasable connection between said power shaft andV one of said supporting means, and manipulable means for preventing movement of said one of said supporting means When said releasable conneotion is disabled.

2. In an elevating grader, a frame, a plow construction including a plow and a longitudinally extending beam, a vlongitudinal shaft on said frame, front and rear connections from said shaft to `said beam, one of said connections including a clutch, and friction brake means for preventing movement of said connecrtlion when .said clutch is disabled.

. 3. Inan elevatinggrader, a frame, a plow construction including'a plow and a longitudinally extending beam, alongitudinal Vshaft. on said frame, front and rear connections from said shaft to said beam, means for operating said connections to raise and lower the respective ends of said beam, means for disabling one of said connections, and friction brake means for preventing movement of the end of said beam associated with said one of said connections.

4.1m' an elevating grader.; a plow, a frame, means for adjustably supportingl said plow on said frame, power operated control mechanism for adjusting said supportingmeans, and means for varying the control-of `said control mecha- ,nism including clutching means anda friction brake associated with saidsupporting means andV operable independently of said control mechanism. H l

' 5. InV an elevating grader; a frame; a plow construction, including a longitudinally extending beam, and a plow supported thereon; a longitudinally extending power shaft journaled on said frame; lift means from the front of said shaft to said beam, including a drum xed to said shaft,A and a chain connected to said drum ing beam, and a plow supported thereon; a longitudinally extending power shaft journaled on said frame; lift means from the front of said shaft to said beam, including a drum fixed to said shaft, and a chain connected to said drum and to said beam; and lift means from the rear of said shaft to said beam, including a second drum journaled on said shaft, a chain connected to said drum and to said beam, a clutch connec- 10 tion between sai-d drum and said shaft, control means for said clutch connection, a brake drum portion associated with said second drum, and brake means associated with said brake portion.

7. In an elevating grader, a plow support,

15 spaced adjustable connections to said plow support, power operated means for adjusting said connections together, and means for disconnecting one of said connections from said power operated means and rendering said one connec tion capable of adjustment independent of said power operated means.

8. In an elevating grader, a plow support, spaced adjustable connections to said plow support, operating means including a rotatable shaft upon which both of said connections are mounted for adjusting said connections together, andmeans for disconnecting one ofsaid connections from said shaft and rendering said one connection capable of adjustment independent of said operating means.k

, y CARL A. GUSTAFSON. 

